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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 525-528 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 3377-3384 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Some new vinyl derivatives of cellulose have been synthesized under anhydrous conditions using potassium cellulosate. The unsaturated groups were introduced by esterification with acryloyl chloride and by etherification with vinylbenzyl chloride or via 5-chloromethylsalicylaldyhyde derivatives. Levels of cellulose substitution of from ∼10-75% of glucose residues were achieved. Polystyrene was readily grafted onto all the derivatives via solution polymerization in toluene, using azobisisobutyronitrile as a thermal initiator. Weight fractions of styrene of up to ∼0.4 were readily obtained.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 28 (1983), S. 3137-3144 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A number of particulate polyethylene and polypropylene based matrices have been γ -radiation grafted with poly(acryloylsarcosine methyl ester). The resulting composite materials have physicochemical properties attractive for use in continuous solid phase synthesis. Three macroporous polystyrene resins have also been impregnated with a secondary polyamide network using thermal initiation. All of these retain their rigid spherical structure and the composite properties again make them good candidates for use under pressure. One of these has been used in a preliminary solid phase experiment and two successive amino acid residues coupled with ∼100% yield.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Vernetzte Poly(methylmethacrylat)-Perlen wurden mit LiAlH4 reduziert oder mit Ethylendiamin aminiert. Bei der nachfolgenden Acylierung der Hydroxymmethyl-beziehungsweise Amin-Seitengruppen mit Chloracetyl-, p-Brommethylbenzoyl- oder 11-Bromundecanoyl-chlorid wurden die entsprechenden Halogenderivate erhalten. Die Behandlung dieser Polymere mit Triphenylphosphin ergab polymere Phosphoniumsalze. Die katalytische Aktivität dieser Produkte wurde bei verschiedenen anionischen Reaktionen getestet. Die Ergebnisse zeigen, daß die auf PMMA basierenden polymeren Phosphoniumsalze in zweiphasigen flüssig-flüssig-Systemen die Anionen wirksam aktivieren. In fest-flüssig-Systemen wird die katalytische Aktivität der polymeren Katalysatoren stark verringert.
    Notes: Crosslinked poly(methyl methacrylate) beads were reduced with LiAlH4 or aminated with ethylenediamine followed by acylation of the hydroxymethyl or amine pendant groups with chloroacetal-, p-bromomethylbenzoyl-, or 11-bromoundecanoyl chloride to give the corresponding polymeric halogen derivatives. Treatment of these resins with triphenylphosphine gave the polymeric phosponium salts. The catalytic activities of the products were tested in various types of anion promoted reactions. The results show that polymeric phosphonium salts based on PMMA effectively activate the anions in liquid-liquid two-phase systems. In solid-liquid systems the catalytic activity of these polymeric catalysts is greatly reduced.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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